Mesoporous zirconia nanostructures embedded Polyvinyledine difluoride conducting films for EMI shielding applications

Gayathri, T.; Kavitha, N.; Chandramohan, A.; Roy, Debmalya; Dinakaran, K.

doi:10.1016/j.matpr.2021.11.564

Cited by 10 publications

(7 citation statements)

References 40 publications

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“…In summary, the MWCNT/GNS/Fe 3 O 4 tricontinuous networks induced by the synergistic effect of the carbon nanoallotrope stacking, multiple DA mechanisms, and amphiphilic building blocks endow the nanocomposites with excellent reprocessing, self-healing, and EMI shielding properties. A comparison of some previously reported EMI shielding materials ,− and the nanocomposite system developed in the current study is presented in Table . From the comparative results, it can be observed that the tricontinuous network structured system in this work exhibited competitive EMI shielding effectiveness, indicating that it can be a good candidate for future highly efficient EMI shielding applications.…”

Section: Resultsmentioning

confidence: 99%

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe₃O₄ Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

Lee

Wang

Tsai

et al. 2022

ACS Appl. Nano Mater.

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Recently, high-performance self-healing electromagnetic interference (EMI) shielding materials with superior electrical conductivity, excellent shielding efficiency, and effective selfrepairing ability have gained great attention. However, the practical development of such systems still encounters considerable challenges. In this study, a highly efficient EMI shielding selfhealing nanocomposite system composed of multiple components of multiwalled carbon nanotubes (MWCNTs), graphene nanosheets (GNSs), and Fe 3 O 4 nanoparticles was developed by integrating a novel amphiphilic poly(ethylene glycol)-block-poly-(caprolactone-co-furfuryl glycidyl ether) block copolymer (PEG-b-PCLF) with 1,1′-(methylenedi-4,1-phenylene)bismaleimide and nanofillers via Diels−Alder (DA) chemistry and molecular affinity. Within this composite system, MWCNTs were distributed within the GNSs and served as connecting bridges across adjacent GNSs. Simultaneously, Fe 3 O 4 nanoparticles were uniformly interspersed in the space around the MWCNT/GNS staggered framework due to good affinity with the hydrophilic PEG block, thereby forming MWCNT/GNS/Fe 3 O 4 tricontinuous networks. Upon heating, the retro-DA mechanisms endowed the material system with excellent reprocessability and self-repairability. More importantly, the MWCNT/GNS/Fe 3 O 4 tricontinuous networks not only provided efficient channels for charge transport but also served as an electromagnetic framework that synergistically endowed the material system with excellent EMI shielding properties. Accordingly, a favorable electrical conductivity of 18.5 S m −1 and an extremely high shielding effectiveness of 92.7 dB in the X-band were achieved. Additionally, the material system also possessed sufficient performances in the recovery of mechanical properties and shielding efficiency after repair, thereby leading to a prolonged service life. This study offers a promising strategy for the effective integration of multiple electromagnetic nanofillers into a self-healing polymeric system, which leads to highly efficient electrical and EMI shielding properties as well as remarkable self-repairability. We believe that these results can guide the development of advanced, durable EMI shielding applications.

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Section: Resultsmentioning

confidence: 99%

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe₃O₄ Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

Lee

Wang

Tsai

et al. 2022

ACS Appl. Nano Mater.

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“…In such a case, polystyrene, poly(methyl methacrylate), poly(vinyl alcohol), polyimide, polyurethane, polypropylene, epoxy resin, and poly(vinylidene fluoride) (PVDF) are often used as the flexible matrixes, , and among them, PVDF is recommended due to its excellent flexibility, lightweight, processability, and dielectric properties . Therefore, many flexible EMI SE composites based on PVDF have been developed for potential practical applications. − It is reported that the EMI SE performance of Ag/graphite/PVDF flexible composite films prepared by Kumaran et al via embedding Ag nanoparticles into graphite was measured to be 29.1 dB at 12.4 GHz . The Ag–Cu/CNT/graphene/PVDF composite films prepared by Rengaswamy et al via solvent casting technology showed an EMI SE performance of 29 dB at 0.1 mm .…”

Section: Introductionmentioning

confidence: 99%

Flexible Multilayered Poly(vinylidene fluoride)/Graphene-Poly(vinylidene fluoride) Films for Efficient Electromagnetic Shielding

Fang

Chen

et al. 2023

ACS Appl. Nano Mater.

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Developing flexible electromagnetic interference shielding (EMI SE) materials is an effective strategy to protect humans from being harmed by electromagnetic radiation from electronic devices. Though the EMI SE property of such materials as graphene can exceed 100 dB, it remains a challenge to achieve high-efficiency EMI SE performance while having excellent flexibility to allow them to be wearable. Herein, we designed theoretically and fabricated experimentally the flexible multilayer structure of the poly(vinylidene fluoride)/graphene-poly(vinylidene fluoride) (PVDF/GNP-PVDF) composite films. The experimental results show that the film thickness and layer number play an important role in determining the EMI SE performance, and the multilayer film with a thickness of 0.3 mm and a layer number of 6 exhibits not only high EMI SE performance (69.7 dB on average in X-band) but also excellent flexibility and stability (98.85% EMI SE retention after bending of 60° for 1000 cycles). The theoretical study via COMSOL software matching well with the experimental data reveals that multiple reflection and absorption of electromagnetic waves between layers is responsible for the high EMI SE performance of the PVDF/GNP-PVDF multilayer film at a relatively low thickness that ensures flexibility. This work highlights the significance of designing the multilayer architecture via theoretical simulation for improving the EMI SE performance and also demonstrates the high EMI SE application prospect of PVDF/GNP-PVDF films in wearable electronic devices.

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“…These fillers include Ag, Cu, Fe 3 O 4 , SiO 2 , ZnO, Fe and their alloys, etc. With the addition of the dielectric and magnetic fillers, the absorption percentage of shielding can be enhanced 32,33,34 . Epoxy/CF composite with modification on CF has been extensively studied by the researchers in the last decade.…”

Section: Introductionmentioning

confidence: 99%

“…With the addition of dielectric and magnetic fillers, the absorption percentage during shielding can be enhanced. [32][33][34] Epoxy/CF composites with CF modification have been extensively studied by researchers in the last decade.…”

Section: Introductionmentioning

confidence: 99%

“…With the addition of dielectric and magnetic fillers, the absorption percentage during shielding can be enhanced. 32–34 Epoxy/CF composites with CF modification have been extensively studied by researchers in the last decade. Gholampoor et al 35 prepared nano-Fe 3 O 4 powder via a co-precipitation method and deposited this on CFs using an electrophoretic deposition (EPD) method; it was then incorporated into epoxy.…”

Section: Introductionmentioning

confidence: 99%

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‘Template-free’ synthesis of self-assembled micro-spikes resulting in ‘sea-urchin’-like carbon structures for suppressing electromagnetic radiation

et al. 2022

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Mesoporous zirconia nanostructures embedded Polyvinyledine difluoride conducting films for EMI shielding applications

Cited by 10 publications

References 40 publications

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe₃O₄ Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe₃O₄ Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

Flexible Multilayered Poly(vinylidene fluoride)/Graphene-Poly(vinylidene fluoride) Films for Efficient Electromagnetic Shielding

‘Template-free’ synthesis of self-assembled micro-spikes resulting in ‘sea-urchin’-like carbon structures for suppressing electromagnetic radiation

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Mesoporous zirconia nanostructures embedded Polyvinyledine difluoride conducting films for EMI shielding applications

Cited by 10 publications

References 40 publications

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe3O4 Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe3O4 Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

Flexible Multilayered Poly(vinylidene fluoride)/Graphene-Poly(vinylidene fluoride) Films for Efficient Electromagnetic Shielding

‘Template-free’ synthesis of self-assembled micro-spikes resulting in ‘sea-urchin’-like carbon structures for suppressing electromagnetic radiation

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Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe₃O₄ Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe₃O₄ Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding